package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.UserLoginVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    private static final String WX_Login = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public User login(UserLoginDTO userLoginDTO) {
        //向微信服务端发送请求，获取登录对象信息，得到openid
        String openId = getOpenId(userLoginDTO);

        //判断是否是新用户,新用户需要创建出来
        User user = userMapper.selectByOpenId(openId);

        if (user == null) {
            user = User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        return user;
    }

    private String getOpenId(UserLoginDTO userLoginDTO) {
        Map<String, String> paramMap = new HashMap<>();
        paramMap.put("appid",weChatProperties.getAppid());
        paramMap.put("secret",weChatProperties.getSecret());
        paramMap.put("js_code", userLoginDTO.getCode());
        paramMap.put("grant_type","authorization_code");

        String userJson = HttpClientUtil.doGet(WX_Login, paramMap);
        JSONObject jsonObject = JSON.parseObject(userJson);
        String openid = (String) jsonObject.get("openid");

        return openid;
    }
}
